Johnny Manziel: A timeline of the troubled football star

Story highlights

  • Ex-girlfriend Colleen Crowley says Manziel assaulted her
  • Two agents dropped Manziel as a client

(CNN)Johnny Manziel's turbulent time with the Cleveland Browns ended in March, and his future in the NFL is in doubt. After two years in the league and now facing an assault allegation, Manziel's NFL career could flame out almost as quickly as he rose to stardom.

A Texas grand jury has indicted Manziel on an assault charge, according to Dallas County court records. Manziel's former girlfriend Colleen Crowley says in an affidavit that the NFL quarterback restrained, hit and threatened her during an alleged assault. She says Manziel grabbed her by the hair and hit her, causing her to lose her hearing in one ear. Manziel has denied hitting Crowley.
Have we seen the last of Johnny Football on the field? Here's a look back on the highs and lows in his troubled life.
June 29, 2012: Freshman season arrest
Manziel, a redshirt freshman at Texas A&M, was arrested and accused of disorderly conduct, failure to identify himself to police and having a fake identification card. He ultimately pleaded guilty to a misdemeanor charge of failing to properly identify himself to police. The counts of possessing a fake driver's license and a charge of disorderly conduct by fighting were dismissed when a judge accepted Manziel's guilty plea.
November 10, 2012: Manziel helps topple No. 1 Alabama
Manziel takes the national stage, leading Texas A&M to a 29-24 upset win against No. 1 Alabama at Bryant-Denny Stadium in Tuscaloosa, Alabama, propelling him into the Heisman Trophy conversation.
December 8, 2012: Manziel wins Heisman
Manziel makes history by becoming the first freshman to win the Heisman.
August 28, 2013: NCAA suspends Manziel
The NCAA announces that Manziel will serve a half-game suspension in Texas A&M's season opener against Rice on August 31 for "inadvertent violation regarding the signing of certain autographs." The NCAA and Texas A&M said there was no evidence that Manziel, already known for giving the "money sign" during games, received money in exchange for autographs, but it still suspended him.
He didn't appear to be deterred once he entered the game, however, doing an autograph gesture and giving his money sign.
May 8, 2014: NFL draft
The Browns, trading up in the NFL draft, select Manziel as the 22nd overall pick.
July 25, 2014: Browns 'alarmed' about Manziel
According to a report from Cleveland.com, the Browns are "alarmed" by some of Manziel's actions since they drafted him, including parties in College Station and Las Vegas as well as a photo surfacing of Manziel rolling up a $20 bill in the bathroom of a bar. Other photos during the partying showed Manziel drinking champagne.
August 18, 2014: Manziel's obscene gesture
Manziel gives the middle finger toward the Washington Redskins' bench during a preseason game; he would be fined a reported $12,000.
November 22, 2014: Incident at apartment building
NCAA says Texas A&M's Johnny Manziel must sit half a game